Add iOS Password AutoFill support for login and registration

Enable system-level password generation and iCloud Keychain integration:

RegisterView:
- Add .textContentType(.username) to username field
- Add .textContentType(.emailAddress) to email field
- Add .textContentType(.newPassword) to password fields for Strong Password
- iOS will suggest secure passwords and offer to save to Keychain

LoginView:
- Add .textContentType(.username) to email/username field
- Add .textContentType(.password) to password fields
- Enables AutoFill from saved Keychain credentials

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

iosApp/iosApp/Login/LoginView.swift

@@ -89,6 +89,7 @@ struct LoginView: View {
                                         .textInputAutocapitalization(.never)
                                         .autocorrectionDisabled()
                                         .keyboardType(.emailAddress)
+                                        .textContentType(.username)
                                         .focused($focusedField, equals: .username)
                                         .submitLabel(.next)
                                         .onSubmit {
@@ -126,6 +127,7 @@ struct LoginView: View {
                                             TextField("Enter your password", text: $viewModel.password)
                                                 .textInputAutocapitalization(.never)
                                                 .autocorrectionDisabled()
+                                                .textContentType(.password)
                                                 .focused($focusedField, equals: .password)
                                                 .submitLabel(.go)
                                                 .onSubmit {
@@ -134,6 +136,7 @@ struct LoginView: View {
                                                 .accessibilityIdentifier(AccessibilityIdentifiers.Authentication.passwordField)
                                         } else {
                                             SecureField("Enter your password", text: $viewModel.password)
+                                                .textContentType(.password)
                                                 .focused($focusedField, equals: .password)
                                                 .submitLabel(.go)
                                                 .onSubmit {

iosApp/iosApp/Register/RegisterView.swift

@@ -37,6 +37,7 @@ struct RegisterView: View {
                     TextField("Username", text: $viewModel.username)
                         .textInputAutocapitalization(.never)
                         .autocorrectionDisabled()
+                        .textContentType(.username)
                         .focused($focusedField, equals: .username)
                         .submitLabel(.next)
                         .onSubmit {
@@ -48,6 +49,7 @@ struct RegisterView: View {
                         .textInputAutocapitalization(.never)
                         .autocorrectionDisabled()
                         .keyboardType(.emailAddress)
+                        .textContentType(.emailAddress)
                         .focused($focusedField, equals: .email)
                         .submitLabel(.next)
                         .onSubmit {
@@ -60,7 +62,10 @@ struct RegisterView: View {
                 .listRowBackground(Color.appBackgroundSecondary)
 
                 Section {
+                    // Using .newPassword enables iOS Strong Password generation
+                    // iOS will automatically offer to save to iCloud Keychain after successful registration
                     SecureField("Password", text: $viewModel.password)
+                        .textContentType(.newPassword)
                         .focused($focusedField, equals: .password)
                         .submitLabel(.next)
                         .onSubmit {
@@ -69,6 +74,7 @@ struct RegisterView: View {
                         .accessibilityIdentifier(AccessibilityIdentifiers.Authentication.registerPasswordField)
 
                     SecureField("Confirm Password", text: $viewModel.confirmPassword)
+                        .textContentType(.newPassword)
                         .focused($focusedField, equals: .confirmPassword)
                         .submitLabel(.go)
                         .onSubmit {
@@ -78,7 +84,7 @@ struct RegisterView: View {
                 } header: {
                     Text("Security")
                 } footer: {
-                    Text("Password must be secure")
+                    Text("Tap the password field for a strong password suggestion")
                 }
                 .listRowBackground(Color.appBackgroundSecondary)